Trimming machine



Sept. 25, 1934. A. EPPLER TRIMMING MACHINE Filed Jan. 10, 1953 3Sheets-Sheet l l l l .rl

Sept. 25, 1934. A. EPPLER TRIMMING MACHINE Filed Jan. 10, 1933 5Sheets-Sheet 2 a. \\f w.. N w #I Sept. 25, 1934. A. EPPLER TRIMMINGMACHINE Filed Jan. 10, 1933 3 Sheets-Sheet 3 A Il l and 5.

shipping cutter at the opposite limit of its range of travel.

The lasted shoe represented in Figs. 3, 4 and 6 comprises the usualupper 10, insole 11, welt 12, and inseam stitches 13, the latterextending through the welt, the upper and the between substance 14 ofther insole. A last 15 is represented in Figs. 4 and 6.

In a shoe of this type the upper 10 (which commonly includes a lining)is cut initially to provide surplus material for lasting purposes. As aresult of the lasting operation, the margin 16 of surplus upper materialprojects from the bottom of the insole 11 and lies against the betweensubstance 14 of the insole. Moreover, this margin. 16 of surplus uppermaterial and commonly also the between substance 14 of the insole remainas represented in the drawings until after the linseam stitches 13 havebeen sewn to attach the welt 12 and to form a permanent lconnectionbetween th upper and the insole, but before an outsole can be laid it isnecessary to sever the upstanding between substances 14 and 16 nearlybut not quite to the level of the inseam stitches 13. VA narrowv stripof the welt 12 may also be severed vinci dentally to severing thesubstances 14 and 16 as above described.v

This operation, which, in the case of a welt shoe, is commonly known asinseam-trimming, is begun at a point indicated at 17 in Fig." 3 andprogresses lengthwise of the shoe to and around the toe-end and thencealong the opposite side to a corresponding point indicated at 18. Thesurplus materials to be thus severed commonly include as many as fivelayers in the shank-portion and in the ball-portion, and may includefrom one to three additional layers at the toe-end where many shoes areprovided with tips and toe-stifien ers impregnated with a stickycompound com- .prising wax and asphaltum. Irrespective of the number oflayers thus severed, it is common vto sever them in such a way as toproduce one continuous strip coextensive with the total range oftrimming. Such a strip is not only long and crooked but is in many casesso thick and stiif as to involve diiculty with regard to its disposalnot only while the severing is in progress but thereafter.

The general organization of the machine herein illustrated is similar tothat illustrated in United States Letters Patent No. 1,169,070 grantedJanuary 18, 1916 on an application led by me. As in my former machinethe present machine comprises a rotary cup-shaped cutter 20 forsevering, v `the surplus materials hereinbefore described, this cutterbeing frusto-conical and provided with an endless cutting edge 21 thatis circular except that it is preferably divided into many smallscallops that are readily apparent when viewed as in Figs. Theillustrated organization is such that the cutter 20 rotates about ahorizontal axis in the direction indicated by an arrow 22 in Fig. 4, theopen end or cutting edge 21 being at the right and the closed end at theleft. Consequently, in

operation, the shoe must be fed from right to left.

The strip of severed materials enters the cutter and impinges againstthe holder or stock by which the cutter is supported and driven.

As illustrated in Fig. 5, the holder or support-l ing vstock for thecutter comprises a circular disk A' 23, a sleeve 24, anda circularclampingdisk 25,

parts constituting the holder are mounted upon a stationary stud 27relatively to which they may rotate.

A segment of the cutter 20 is nested in an annular bell-mouthed member28 screwed into and forming the receiving end of a tubular, down-draftnozzle 29 which constitutes a section of a pneumatic suction-pipethrough which air may be drawn by a fan or blower (not shown) to carryaway waste-pieces severed from shoes. The, direction of rotation of thecutter 20 is such as to throw dust and chips into the nozzle 29.Moreover,'the nozzle 29 is rotated about its axis to feed a lasted shoepast the cutter 20, but, unlike the corresponding nozzle shown in theaforesaid Ballard patent, its axis is steeply inclined to utilize theforce of gravity for assisting the waste-pieces therethrough.

.The bell-mouthed member 28 constiutes a feedroll for operating on themargin of the upturned bottom'of a shoe, and the flare of its externalsurface 30 counteracts the inclination of the nozzle 29, to the end thatthe portion that overlies and acts onA the margin of the shoe will besubstantially horizontal. As shown, this flared work-feeding surface 30is scalloped to provide fine work-feeding teeth. When operating on awelted shoe the surface 30 cooperates with a freely rotatable supportingroll 31 to clamp the welt, the roll 3l being normally raised by a springto apply the clamping pressure but being depressible bymanually-operated means to facilitate the introduction of a welt.-

As shown in Figs. 1 and'2, the means for supporting and controlling theroll 31 comprise a post 32, a vertically movable slide 33, a compressionspring 34, a lever 35, and a rod 36 pivotally connected to the lever andextending downwardly to a treadle (not shown). The post 32 is mortisedinto the slide 33 with cooperative dove-tail forma-V tions (Fig. 1) thatprovide for adjusting it forward and back as may be necessary to placethe roll 31 in the most desirable cooperative relation to thefeed-roll-28. Moreover, the dovetail portion of the slide 33 is dividedby a kerf 37 and is provided with a bolt 38 by which itrmay becontracted to clamp the post 32. arranged in a guiding fixture 39secured to the head or frame 40 by screws 41. The spring 34 is seated ona screw 42 bywhich its applied force j,

may be regulated, the screw having threaded connection with va portionof the xture 39. The upper portion of the spring extends into a socketformed in the slide 33 and applies its force upwardlyagainst the upperend of the socket. To prevent the roll 31 from engaging the scallopedsurface 30 when no welt is between them, the slide 33 is provided withan adjustable stop-screw 43' arranged to abut against a nger 44 formedon the fixture 39.` When the lever 35 is depressed, its forward endengages a lug 45 formed on the slide 33 to separate the roll 31 from thefeeding member 28.

As shown in -Fig. 2, the nozzle 29 is rotatably mounted in a bearingformed in the head or j' frame 40, its lower end being fitted into a xedsection 46 of the waste-pipe, the connection being such. that althoughthe nozzle 29 may rotate while the section 46 remains stationary noappreciable leakage of air occurs at the joint. Between its ends thenozzle 29 is provided with. a worm-gear 47 by which it may be driven tofeed the work, a worm 47 for this purpose being aixed' to a shaft 48journaled in the head 4Q. The

The slide 33 is shaft 48 sgprovided Withaepulleyil:onwwhichlat beltmaymunto .operate.themachine A.:cutti\ngiedgev.50 ,(Figs' 4;;5; and 6bffor dividingithe stnips=offsurplus'materials,14h16 -into 'short-fsectionsvis formed-at; orieaendfofv an arcuatezblade t 51'. This.-bladefhasadovetailicrossfseetiun (see: Fig,l 5 )f andiis-:thusfadaptedftoxbe icontrolled and .V guidedin as'ourvilinear path'by a correspondingly curvedidove-tail :groove formed in:a-cutter-iguard. 52 that lies close Ktofthe circular-..zcuttingedgelgfand-covers :a ylarge segment ofthe :open-1 end :of thesrotaiiyicutterY20.-.:l ThezcuttereguardwZ falso@ causeswthestreamofvairapproaehingithe nozzle 29.:itof,floWfirst-into the-cavityfinithecutter 202.-. The'fshankaoi the ebladev 51 `narrieszraepivotstud-f54,".by which: it yisziconneetedtto :anA operating linkr- 5511. Theflink @engages a wrist-.pini 56 @arried bya 'f continuouelypdriven:gea-rl. 5'7Y :to which., rotation., is icomrnunicatedabyia:train ofconnections herein-.O

l after described.

When-the bladei51 iswfully retracted; i as shown infFigaxlfi andiwit isentirely lout-.ofthe fpath-.oa the #materials 14 's and 16.being;severed.byithe:Y cuttery 20'; but! when the y:bladexis moved.forwardbyf theWristapin\.56 .itsfcutting .1 edge e150interseets.thefmaterials 14 and-a1 6 -to -snip or dividel them into.-. shortseetions..

The :surplus-.rfmaterials-s 14fand. 16 :are -bracedv against thefrictional dragqfofftheerotary:cutter 20.1andagainstrtheithrustrofvthefsnippingiblade 5lt ,by a hardenedsteelcuttingzzblocki 60 t having- E.; arshearingiaedge :Withzwhich:thea-snipping :edgecooperateszi Thevblockf()v isi-,rigidly secured tofafixturefl .(Fig; 5): that :coversia'large'seg-f.-

` I ment' ofithe :mouth:offtheiwastenozz-le 29 -toncon-ff serve; :theAforce S of: the pneumatic sucticn anda to concentrate A:its :effect atithe. peint-cv .Where the". Waste .products :pass- :f-rom fthefmoiuth f`of .the cutteri20finto ftheznozzlew Since :thefxture 61 tandf:

`first into the cavity of the cutter=`201beforcewit3 reachesrthefpointwherelthefwaste `pro-ducts are dischargedi-ifrom the cutter.` Ity lia=thus :assured'i: that; .theawastewfproduc-ts; will f `be''.pnfornlotlywith+ dran/nl :from: the "trimming icutter;

The-.narroW-gap fioetazveerrl the feutting-block-.G- andtheouttereg-uard 52providee':achannel; through .whioh ythe vsurplusmaterials: 14 'sandfal f. andesomei ofxthe f-ingoing r fain i may passtto renter'. the trinin'iin;` icutter s2 0.x, Sincerrthe isnipping :cute

tezrf'effisuslightly in: advance-iofthefouttingedge 21,-thevsurp1us@materials AT14@ and' 16 `Evvi-ll .ben di.` vided into, short sectionsbefore they are sei/'credo f1:o1n:..the.:shoef= andf jtheyi will aethereorevfremain under-.suitable fcontro'l Wi-threspect itortheir pres'i' eifitationztov both cutters.-

- The A'galoA above referreda to is'A occupiedribylan: auxiliary',feedfroll: 62 that yengagesmthe insoleell in athe angle-formed i =bygthe =-upstandingq.liptll:t This roll! fis; `Vnot 'only dri'venf in ithe 'directionfre-e 631x by which: itz'is:carried;. the Ispindlefbeing:jour-1 naled-.in a bearingx member'rGL-.a The {member-'164 isfcarriedby@ the .cutter-*guard.f52\..fandfseeurede thereto-by aclarnping boltf'mith-fzpromfisidnzforf adjustment tlengthwise rofl the axisiofftheaspindle to=.a z swinging head 65@ by n clamping).bolts :61,1 thef:holesfssfthrough.' :whieh ithee :bolts fextend being elongated to-v:prov-ideor, adjusting theqguardf 52 upgandaidownnasmaygbevneeessarytazplan@ :it

in rethefedesiiied :relation-A to Y fthe.: rotary ecutter- 1.20.11 8USince the shipping vcuttern4 51 iis. carriednbyvthef cutter-@guard52cits xcuttingq. end iwilltnecessarilyg, partakeV .vofnthis'.adjustmentandv may, ifi ,desiredgfy be-wpositionediat:ia:relatively;flow. level to" locate thefsnippingl cuts :so 1 thatthey:Willintersectathe 85 line on Which-thefsurplusematerials) wi1libesev= eredv Thus,-,the short Aseetionsfof .the .Asevered materals-qmay`gbe xentirely divided: one from: arr-,.- othene. On'thexotherhand,-.thei:cutte1tfguard :52: may fibeeadjusted'. torlocate:the cutting -i edge: 50i 9 0 of thef snipping.: cutter.i entirely abovethe eline along Whichauthe :surplus-:materials will ibewseveered', eand` thus :provide for Ydividing the materials intof-short .seictionsthat i -Wi'lL frernain connected' in a train bys1ender-,-.but.easilyexiblef'unc-ut. 95 portions of'thesevered stripe,

vThe .swingingiyheadi i is..hung.;onxed; trunk nions '70 (Fig. 1)mounted-:inthenlpperwpartofi theihead orfr-arneil,t Themight-handtrunnionisitubulaii and-.provides-a-zbeavina fora-.100 driven-shaft ..71(Figi. 2) by'fwhieh rotation-=is; communicatedl to the xauxiliaryfifeederoll 162y 2 and: tofthe gear 57= that carries-rthevwrist-pinflfor: operating the snippingcutter.;4 An arm-' 72 '(Fi'gzf 2).valiixedrto-thesvvingingpheadandextends 105i to .the rear Where -itisengagedabyya compression spring .that 'normally' -maintainesthe:auxiliary feed'-roll i 62 in. position! to clamp the surplusfmaaterials ligandv 16 of .arshoe-fagainststhe cutting*- block 60 Moreover,thearm 72 .is eonnectedfWi-th.- 11!` the :lever byia flink .Zlptheeefectofffwhichf-isi: to retract the auxiliary feed-roll 62 andifthef.shipping cutterv 45l- -from? the f-feed-rollf.' 28 When the ltreadle isioperated to .depi'esstthei supporting;1 roll .31-.. l 115A` Rotation for.driving the auxiliary tfeeiil-roll. 62 ..f is derived from-the shaft 48.-(Fig=s..- 1 :and .2):1 through.`v :a .-traini Kof.- connectionscomprising! the following .partst spurfgeary 75,; spurl-gear". 76,shaft. 77," helical. gear '78; -helic-algean 179,. shaft. 80', 12\helical gear Sl, helical gear 82,-sliaf=t-.'71,I worm. 83,Worm-.gear.84, sha-ft .85,-helical-= gearly and helicall ygear. 87.,- .the latterdyeing 'aiXedn-to :thet spindlef63 .-(Figs.2 and 4).' l

v Rfotatioinsfor.v operatingsthewristepin 56-is.-de- 125" rived from:the. shaft :85, the i gearv=57 4being' pro-.'- vided with: helical.-teeth= that cooperatefwithfan helical-gear B2i-carried by the-shaft.85.

Rotation for operating theyrotary cutter-120listderivedlfromethespurfgear .76 through.- a driving 13011 train comprisingpuregears 90,.91fiand i92f,.fthe' latter. .being vaiiXecL-to the sleeve 24 thatcarries the..rotary cutter..

In .keeping with' the organization shown in. Patent' No. 1,169,070the1nachine.;herein illus- 1351 trated isprovded Withi anlabrading Wheel(Figs. '1 'and "2)" arranged'to sharpen the rotary, cutter 20, and Withmeans for adjustingf'this cutter 'to counteract` "its 'lofssbf lengthinconsequence of being-sharpened; Rotation for 'driving 1405 theabrading"vvheel100` is derived from 'a 'coutiriuously drivenlclutch-'pulley 101 "over 'which a driving belt i 1021`jrunsr Thetransmissionhtrain comprisesv "a `complenfrenta).l iclutchpulle'yj103,'l a" belt 104, and a pu11`e'y1105 longthe'shaft lfthat145Arcarriesftheiabradiiig Wheelfi A manually operative'lshpperi109-is-arranged ito sliifiilthe-k pulley# 101 axially :tolth'e`left(Fig-71) to-I establiSh the clutched relation, thepulley i 103Jfbeingarrangedito @yield tothis ishifting iiinovementf'. butbeing150backed by a compression spring 107 that furnishes the necessary pressureof 'the clutching faces one against the other to insure transmission.

The shaft 106 that'carries the abrading wheel is journaled in anadjustable support 110 (Fig. 2)

by which the grinding wheel may be adjusted toward and from the cutter20. For this purpose the support 110 is engaged by a screw-shaft 111 towhich rotation is imparted by helical gears 112 and 113, the latterbeing carried by a shaft 114 provided with a hand-wheel 115.

To provide for adjusting the rotary cutter 20 as its length is reducedby the abrading wheel, the cutter-supporting stud. 27 (Fig. 1) isaflixed to an adjustable slide 116 the upper portion of which hastongue-and-groove connection with a guideway 117 formedonthe Yhead 40. Ascrew 118 provided with a hand-wheel 119 engages an internalscrew-thread in the slide 116 to afford convenient adjusting means.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. A trimming machine comprising cutting vrmeans arranged to severprogressively a long strip of surplus upper material on the bottom ofa'lasted shoe, and cutting means arranged to snip such surplus materialperiodically and thereby divide it into short sections.

2. A trimming machine comprising cutting means arranged to severprogressively a long strip of surplus upper material on the bottom or alasted shoe, and cutting means arranged in advance of the severinglocality to snip such surplus material periodically and thereby divideit into short sections while it is still attached to the shoe.

3. A trimming machine comprising cutting means arranged to .severprogressively a long strip of surplus upper material on the bottom of alasted shoe, a pair of cooperative shearing cutters arranged to snipsuch surplus material adjacent to the trimming locality, and mechanismfor lrelatively moving said shearing cutters periodically to divide thesurplus material into a series of short sections.

4. A trimming machine comprising a trimming cutter arranged to severprogressively a long strip of material of a work-piece, mechanismarranged lto operate said cutter with movement lengthwise .having acutting edge arranged to sever a flange projecting from a work-piece,mechanism arranged to operate said cutter with motion lengthwise of saidedge, and power-operated cutting means arranged to snip periodically theflange on which said cutter is operating.

7. A trimming machine comprising cutting` means arranged to severprogressively a long strip of surplus upper material on the bottom ofalasted shoe, a cutter arrangedto snip such ,material adjacent to thetrimming locality without cutting entirely through it, and mechanismarranged to operate said cutter periodically.

8. A trimming machine comprising a cutter arranged to snip a strip ofsurplus upper material secured to and projecting from the insole of alasted shoe, mechanism arranged to operate said cutter periodicaly andpower-operated cutting mechanism arranged to sever the snipped materialfrom the shoe progressively as the shoe is fed past said snippingcutter.

9. A trimming machine comprising a rotary driven cutter having anannular cutting edge arranged to sever progressively a long strip ofsurplus upper material on the bottom of a vlasted shoe. a memberarranged to brace said material against the frictionai. drag of saidcutter, said member having a shearing edge, and av reciprocatory cutterarranged to cooperate with said shearing edge periodically to snip saidmaterial at intervals.

10. A trimming machine comprising a stationary cutting block arranged toengage surplus upper material standing up on the bottom of a lastedshoe, a driven roll arranged to feed the shoe past said cutting block, areciprocatory cutter arranged to cooperate with said cutting blockperiodically to snip said material at intervals, and power-operatedcutting means arranged to sever the material so snipped.

11. A trimming machine comprising a pneumatic suction-pipe for carryingaway wastepieces severed from a lasted shoe, a reciprocatory cutter anda rotary annular cutter both arranged in a stream of air about to entersaid pipe, the one to snip and the other tosever surplus upper materialon the bottom of the shoe, and mechanisms for operating said cutterssimultaneously.

12. A trimming machine comprising a steeply inclined down-draftpneumatic suction-pipe for carrying away waste-pieces severed from alasted shoe, two cutters arranged adjacent to the receiving end of saidpipe, one to snip and the other to sever surplus upper material on thebottom of the shoe, and mechanisms for operating said cutterssimultaneously.

13. A trimming machine comprising two cooperative feed-rolls arranged togrip surplus materials projecting from the bottom of a lasted shoe, amovable support by which one of said feed-rolls is carried toward andfrom the other, a cutter carried by said movable support for snippingthe surplus material adjacent to the bite of said feed-rolls, mechanismfor operating said snipping cutter, a cutter arranged to sever thesnipped materials adjacent to the snipping locality, and means foroperating said severing cutter.

Y 14. A trimming machine comprising means arranged to guide and feed alasted shoe, means arranged to snip surplus materials projecting fromthe bottom of the shoe, means arranged to sever the snipped materials,and provisions for relatively adjusting said snipping means and saidsevering means to regulate the relation of the snipping cuts and thesevering cut.

15. A trimming machine comprising a tubular member through which dustand chips may gravitate, the axis of said member being steeply inclinedand said member being arranged to rotate about'said axis and having aflared annular surface at its upper end the flare of which counteractsthe inclination of said axis so that a portion of said surface mayoverlie and engage the margin of the upturned bottom of a'lasted shoe,cutting means arranged adjacent to the upper end of said tubular memberto sever surplus upper material on the bottom of the shoe, mechanism foroperating said cutting means, and means for rotating said tubular memberto feed the shoe to said cutting means.

16. A trimming machine comprising a tubular member through which dustand chips may gravitate, the axis of said member being steeply inclinedand said member being arranged to rotate about said axis and having aared annular surface at its upper end to feed a lasted shoe byengagement with the margin of the upturned bottom thereof, a rotarycutter arranged to sever surplus material on the bottom of the shoe andto throw dust and chips into the upper end of said member, and means forrotating said tubular member to feed the shoe to said cutter.

17. A trimming machine comprising two cooperative feed-rolls arranged togrip surplus upstanding materials forming a seam on the bottom of alasted shoe, a rotary cutter arranged to sever surplus materials thathave passed between said rolls, an inclined tubular member by which oneof said feed-rolls is carried and through which the severedwaste-products may gravitate from said cutter, and means for rotatingsaid tubular member to operate said one of the feed-rolls.

ANDREW EPPLER.

